Initially, it has shown End kernel panic VFS: unable to mount block(0,0). So I booted into 4.15.0-23(older version) through grub menu and updated grub file by the command "sudo update-grub."
Later it is showing end trace error 0eb71c21001ff265 and not proceeding forward.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.19
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
NonfreeKernelModules: kpatch_livepatch_Ubuntu_4_15_0_23_25_generic_40
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 11 17:52:21 2018
InstallationDate: Installed on 2018-07-06 (4 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_IN
SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: release-upgrade
UpgradeStatus: No upgrade log present (probably fresh install)
---
ProblemType: Bug
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: gdm 1388 F.... pulseaudio
subhani007 1947 F.... pulseaudio
CRDA:
global
country IN: DFS-UNSET
(2402 - 2482 @ 40), (N/A, 20), (N/A)
(5150 - 5350 @ 160), (N/A, 23), (N/A)
(5725 - 5875 @ 80), (N/A, 23), (N/A)
DistroRelease: Ubuntu 18.04
HibernationDevice: RESUME=UUID=27694bc7-8e14-4825-bdb0-6bbfcc0458b6
InstallationDate: Installed on 2018-07-06 (11 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: LENOVO 7829A78
NonfreeKernelModules: kpatch_livepatch_Ubuntu_4_15_0_23_25_generic_40
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=en_IN
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=UUID=cd897e12-62e9-40e7-9c44-6e9ef836a20b ro quiet splash
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.15.0-23-generic N/A
linux-backports-modules-4.15.0-23-generic N/A
linux-firmware 1.173.1
Tags: bionic
Uname: Linux 4.15.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 09/16/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 8GET46WW (1.23 )
dmi.board.name: 7829A78
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8GET46WW(1.23):bd09/16/2013:svnLENOVO:pn7829A78:pvrThinkPadL420:rvnLENOVO:rn7829A78:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad L420
dmi.product.name: 7829A78
dmi.product.version: ThinkPad L420
dmi.sys.vendor: LENOVO
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1781206
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.